Ok, we are using a 250 watt HPS light, 3 feet wide x 3 feet deep x 4 feet high, im not sure about fan placement, inlet holes and carbon scrubbers and stuff like that, so if anyone could give me a few tips or help me design it, I would be VERY grateful.
have a look at how oher people have built theirs... i have a couplein my sig... and theres tons of others on this forum....